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PREDICTION OF RESISTANCE AND PROPULSION PERFORMANCE OF HIGH SPEED UNDERWATER VEHICLES USING CFD TOOLS

机译:使用CFD工具预测高速水下车辆的电阻和推进性能

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The flow onto the propulsor behind a marine vehicle is a complex phenomenon due to variety of reasons such as separation of the boundary layer, presence of appendages, three-dimensional curvature at the stern of the vessel etc. For the purpose of designing wake-adapted propulsor, the nature of flow downstream in the vicinity of the propulsor is to be correctly predicted. In the recent past NSTL has pioneered work in the Naval CFD for high speed submerged vehicle applications in India At NSTL a Computational Design and Analysis System is being developed for propulsor design using computational tools. The system essentially consists of three modules. The first module consists of a 3D RANS code for incompressible flows over submerged bodies. This code predicts the flow around the body onto which the propulsor is fitted. The second module consists of a propulsor design package. The third module consists of a panel code for analysis of flow around propellers using potential or panel methods and thus prediction blade section pressures and the open water characteristics of the propeller. The results generated by this Analysis System for a High Speed underwater body with propeller, are presented in this paper.
机译:由于各种原因,如诸如分离边界层,船只在船尾处的阑尾等的各种原因,所以流动的流动是一种复杂的现象。用于设计唤醒适应的目的,如诸如分离的边界层,阑尾等的存在,三维曲率等。推进器,正确预测推进附近的流动的性质。在最近的过去,NSTL在NSTL在印度的高速浸没式车辆应用中,在NSTL下,在NSTL下,正在开发用于使用计算工具的推进设计的计算设计和分析系统。该系统基本上由三个模块组成。第一个模块由3D RANS代码组成,用于对浸没机构的不可压缩流动。该代码预测主体上的流动装修的流动。第二个模块包括推进器设计包。第三个模块包括使用电位或面板方法的螺旋桨周围流动的面板代码,并因此采用预测刀片部分压力和螺旋桨的开放水特性。本文提出了具有螺旋桨高速水下体产生的该分析系统产生的结果。

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